Martin Donohue was born on the 19th of May 1977 at Saint Fiacre Hospital in El Burro Heights. Martin attended Los Santos High while living in Burton. He has two brothers Marcus and Derrick. Donohue graduted high-school in 1994 and joined the Los Santos Police Department in 1998. Martin was promoted and graduated Field Training in 2000 and was assigned to the Mission Row Area as a Patrol Officer. In 2005; Martin was assigned to the Special Operations Division and joined the Special Weapons & Tactics Team. Martin is currently still assigned to the Special Weapons & Tactics Team where he has earnt accomplishments such as; rifle marksman, pistol Marksman and a Police Life-Saving Award for his efforts in an Armed Robbery attempt in 2007. Martin was promoted to Sergeant in 2010 and was assigned as a Watch Sergeant for the Mission Row Area.

Martin was promoted to Lieutenant in 2015 and remains with the Special Weapons & Tactics Team as a Squad Leader, and is the acting Commanding Officer for the Mission Row Area. Martin is married to his wife, Julianne and his two daughters - Marissa and Gemma.